diff options
Diffstat (limited to 'src/soc/intel/sch/lpc.c')
-rw-r--r-- | src/soc/intel/sch/lpc.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/soc/intel/sch/lpc.c b/src/soc/intel/sch/lpc.c new file mode 100644 index 0000000000..f5e17d880a --- /dev/null +++ b/src/soc/intel/sch/lpc.c @@ -0,0 +1,230 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2009-2010 iWave Systems + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <arch/io.h> +#include <arch/ioapic.h> +#include <arch/acpigen.h> +#include <arch/acpigen.h> +#include <cpu/cpu.h> +#include <cbmem.h> +#include <string.h> +#include <drivers/intel/gma/i915.h> +#include "nvs.h" +#include "chip.h" + +/* SCH LPC defines */ +#define SCH_ACPI_CTL 0x58 +#define SCH_SIRQ_CTL 0x68 +#define PIRQA_ROUT 0x60 +#define PIRQB_ROUT 0x61 +#define PIRQC_ROUT 0x62 +#define PIRQD_ROUT 0x63 +#define PIRQE_ROUT 0x64 +#define PIRQF_ROUT 0x65 +#define PIRQG_ROUT 0x66 +#define PIRQH_ROUT 0x67 + +typedef struct soc_intel_sch_config config_t; + +/* PIRQ[n]_ROUT[3:0] - PIRQ Routing Control + * 0x00 - 0000 = Reserved + * 0x01 - 0001 = Reserved + * 0x02 - 0010 = Reserved + * 0x03 - 0011 = IRQ3 + * 0x04 - 0100 = IRQ4 + * 0x05 - 0101 = IRQ5 + * 0x06 - 0110 = IRQ6 + * 0x07 - 0111 = IRQ7 + * 0x08 - 1000 = Reserved + * 0x09 - 1001 = IRQ9 + * 0x0A - 1010 = IRQ10 + * 0x0B - 1011 = IRQ11 + * 0x0C - 1100 = IRQ12 + * 0x0D - 1101 = Reserved + * 0x0E - 1110 = IRQ14 + * 0x0F - 1111 = IRQ15 + * PIRQ[n]_ROUT[7] - PIRQ Routing Control + * 0x80 - The PIRQ is not routed. + */ + +#define PIRQA 0x03 +#define PIRQB 0x05 +#define PIRQC 0x06 +#define PIRQD 0x07 +#define PIRQE 0x09 +#define PIRQF 0x0A +#define PIRQG 0x0B +#define PIRQH 0x0C + +static void sch_pirq_init(device_t dev) +{ + device_t irq_dev; + + /* Get the chip configuration */ + config_t *config = dev->chip_info; + + pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing); + pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing); + pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing); + pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing); + + pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing); + pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing); + pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing); + pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing); + + /* Eric Biederman once said we should let the OS do this. + * I am not so sure anymore he was right. + */ + + for (irq_dev = all_devices; irq_dev; irq_dev = irq_dev->next) { + u8 int_pin = 0, int_line = 0; + + if (!irq_dev->enabled || irq_dev->path.type != DEVICE_PATH_PCI) + continue; + + int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN); + + switch (int_pin) { + case 1: /* INTA# */ + int_line = config->pirqa_routing; + break; + case 2: /* INTB# */ + int_line = config->pirqb_routing; + break; + case 3: /* INTC# */ + int_line = config->pirqc_routing; + break; + case 4: /* INTD# */ + int_line = config->pirqd_routing; + break; + } + + if (!int_line) + continue; + + pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, int_line); + } +} + +static void sch_fixups(struct device *dev) +{ + u32 rcba_base; + + /* This needs to happen after PCI enumeration. */ + /* RCBA32(0x1d40) |= 1; */ + rcba_base = pci_read_config32(dev, 0xF0); + + /* Remove the enable bit. */ + rcba_base = rcba_base >> 1; + rcba_base = rcba_base << 1; + *((volatile u32 *)(rcba_base +0x104)) &= 0xFF00FFFF; +} + +static void lpc_init(struct device *dev) +{ + printk(BIOS_DEBUG, "SCH: lpc_init\n"); + + /* Setup the PIRQ. */ + sch_pirq_init(dev); + pci_write_config8(dev, SCH_SIRQ_CTL,0x80); + sch_fixups(dev); +} + +static void sch_lpc_read_resources(device_t dev) +{ + struct resource *res; + + /* Get the normal PCI resources of this device. */ + pci_dev_read_resources(dev); + + /* Add an extra subtractive resource for both memory and I/O. */ + res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); + res->base = 0; + res->size = 0xe000; + res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED | IORESOURCE_FIXED; + + res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); + res->base = 0xff800000; + res->size = 0x00800000; /* 8 MB for flash */ + res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED | IORESOURCE_FIXED; + + res = new_resource(dev, 3); + res->base = IO_APIC_ADDR; + res->size = 0x00001000; + res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; +} + +static void set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + if (!vendor || !device) { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_read_config32(dev, PCI_VENDOR_ID)); + } else { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + ((device & 0xffff) << 16) | (vendor & 0xffff)); + } +} + +static void southbridge_inject_dsdt(device_t dev) +{ + global_nvs_t *gnvs = cbmem_add (CBMEM_ID_ACPI_GNVS, sizeof (*gnvs)); + + if (gnvs) { + const struct i915_gpu_controller_info *gfx = intel_gma_get_controller_info(); + memset(gnvs, 0, sizeof(*gnvs)); + acpi_create_gnvs(gnvs); + + gnvs->ndid = gfx->ndid; + memcpy(gnvs->did, gfx->did, sizeof(gnvs->did)); + + /* And tell SMI about it */ + smm_setup_structures(gnvs, NULL, NULL); + + /* Add it to SSDT. */ + acpigen_write_scope("\\"); + acpigen_write_name_dword("NVSA", (u32) gnvs); + acpigen_pop_len(); + } +} + +static struct pci_operations pci_ops = { + .set_subsystem = set_subsystem, +}; + +static struct device_operations device_ops = { + .read_resources = sch_lpc_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .acpi_inject_dsdt_generator = southbridge_inject_dsdt, + .write_acpi_tables = acpi_write_hpet, + .init = lpc_init, + .scan_bus = scan_lpc_bus, + .ops_pci = &pci_ops, +}; + +/* SCH LPC Interface */ +static const struct pci_driver sch_lpc __pci_driver = { + .ops = &device_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x8119, +}; 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